TY  - CHAP
A1  - Breitbach, Gerd
A1  - Alexopoulos, Spiros
A1  - May, Martin
A1  - Teixeira Boura, Cristiano José
A1  - Herrmann, Ulf
T1  - Analysis of volumetric solar radiation absorbers made of wire meshes
T2  - AIP Conference Proceedings
Y1  - 2019
U6  - http://dx.doi.org/10.1063/1.5117521
SN  - 0094243X
VL  - 2126
SP  - 030009-1
EP  - 030009-6
ER  - 
TY  - CHAP
A1  - Schwager, Christian
A1  - Teixeira Boura, Cristiano José
A1  - Flesch, Robert
A1  - Alexopoulos, Spiros
A1  - Herrmann, Ulf
T1  - Improved efficiency prediction of a molten salt receiver based on dynamic cloud passage simulation
T2  - AIP Conference Proceedings
Y1  - 2019
SN  - 978-0-7354-1866-0
U6  - http://dx.doi.org/10.1063/1.5117566
VL  - 2126
IS  - 1
SP  - 030054-1
EP  - 030054-8
ER  - 
TY  - JOUR
A1  - Puppe, Michael
A1  - Giuliano, Stefano
A1  - Frantz, Cathy
A1  - Uhlig, Ralf
A1  - Schumacher, Ralph
A1  - Ibraheem, Wagdi
A1  - Schmalz, Stefan
A1  - Waldmann, Barbara
A1  - Guder, Christoph
A1  - Peter, Dennis
A1  - Schwager, Christian
A1  - Teixeira Boura, Cristiano José
A1  - Alexopoulos, Spiros
A1  - Spiegel, Michael
A1  - Wortmann, Jürgen
A1  - Hinrichs, Matthias
A1  - Engelhard, Manfred
A1  - Aust, Michael
T1  - Techno-economic optimization of molten salt solar tower plants
JF  - AIP Conference Proceedings art.no. 040033
N2  - In this paper the results of a techno-economic analysis of improved and optimized molten salt solar tower plants (MSSTP plants) are presented. The potential improvements that were analyzed include different receiver designs, different designs of the HTF-system and plant control, increased molten salt temperatures (up to 640°C) and multi-tower systems. Detailed technological and economic models of the solar field, solar receiver and high temperature fluid system (HTF-system) were developed and used to find potential improvements compared to a reference plant based on Solar Two technology and up-to-date cost estimations. The annual yield model calculates the annual outputs and the LCOE of all variants. An improved external tubular receiver and improved HTF-system achieves a significant decrease of LCOE compared to the reference. This is caused by lower receiver cost as well as improvements of the HTF-system and plant operation strategy, significantly reducing the plant own consumption. A novel star receiver shows potential for further cost decrease. The cavity receiver concepts result in higher LCOE due to their high investment cost, despite achieving higher efficiencies. Increased molten salt temperatures seem possible with an adapted, closed loop HTF-system and achieve comparable results to the original improved system (with 565°C) under the given boundary conditions. In this analysis all multi tower systems show lower economic viability compared to single tower systems, caused by high additional cost for piping connections and higher cost of the receivers.
REFERENCES
Y1  - 2019
U6  - http://dx.doi.org/10.1063/1.5067069
VL  - 2033
IS  - Issue 1
PB  - AIP Publishing
CY  - Melville, NY
ER  - 
TY  - JOUR
A1  - Alexopoulos, Spiros
A1  - Hoffschmidt, Bernhard
T1  - Advances in solar tower technology
JF  - Wiley interdisciplinary reviews : Energy and Environment : WIREs
Y1  - 2017
U6  - http://dx.doi.org/10.1002/wene.217
SN  - 2041-840X
VL  - 6
IS  - 1
SP  - 1
EP  - 19
PB  - Wiley
CY  - Weinheim
ER  - 
TY  - CHAP
A1  - Latzke, Markus
A1  - Alexopoulos, Spiros
A1  - Kronhardt, Valentina
A1  - Rendón, Carlos
A1  - Sattler, Johannes, Christoph
T1  - Comparison of Potential Sites in China for Erecting a Hybrid Solar Tower Power Plant with Air Receiver
T2  - Energy Procedia
Y1  - 2015
U6  - http://dx.doi.org/10.1016/j.egypro.2015.03.142
SN  - 1876-6102
N1  - International Conference on Concentrating Solar Power and Chemical Energy Systems, SolarPACES 2014, Beijing, China
SP  - 1327
EP  - 1334
ER  - 
TY  - JOUR
A1  - Alexopoulos, Spiros
T1  - Simulation model for the transient process behaviour of solar aluminium recycling in a rotary kiln
JF  - Applied Thermal Engineering
Y1  - 2015
U6  - http://dx.doi.org/10.1016/j.applthermaleng.2015.01.007
SN  - 1359-4311
N1  - Autor im Original: Spiridon O. Alexopoulos
VL  - 78
SP  - 387
EP  - 396
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - CHAP
A1  - Kronhardt, Valentina
A1  - Alexopoulos, Spiros
A1  - Reißel, Martin
A1  - Latzke, Markus
A1  - Rendon, C.
A1  - Sattler, Johannes, Christoph
A1  - Herrmann, Ulf
T1  - Simulation of operational management for the Solar Thermal Test and Demonstration Power Plant Jülich using optimized control strategies of the storage system
T2  - Energy procedia
Y1  - 2015
SN  - 1876-6102
SP  - 1
EP  - 6
ER  - 
TY  - JOUR
A1  - Kluczka, Sven
A1  - Eckstein, Julian
A1  - Alexopoulos, Spiros
A1  - Vaeßen, Christiane
A1  - Roeb, Martin
T1  - Process simulation for solar steam and dry reforming
JF  - Energy procedia : Proceedings of the SolarPACES 2013 International Conference
N2  - In co-operation with the German Aerospace Center, the Solar-Institut Jülich has been analyzing the different technologies that are available for methanol production from CO2 using solar energy. The aim of the project is to extract CO2 from industrial exhaust gases or directly from the atmosphere to recycle it by use of solar energy. Part of the study was the modeling and simulating of a methane reformer for the production of synthesis gas, which can be operated by solar or hybrid heat sources. The reformer has been simplified in such a way that the model is accurate and enables fast calculations. The developed pseudo-homogeneous one- dimensional model can be regarded as a kind of counter-current heat exchanger and is able to incorporate a steam reforming reaction as well as a dry reforming reaction.
Y1  - 2014
U6  - http://dx.doi.org/10.1016/j.egypro.2014.03.092
SN  - 1876-6102 (E-Journal)
VL  - 49
SP  - 850
EP  - 859
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - RPRT
A1  - Hoffschmidt, Bernhard
A1  - Alexopoulos, Spiros
T1  - Entwicklung der Designvoraussetzungen für ein hybrides Solarthermisches Kraftwerk : Kurztitel: HybSol ; Abschlussbericht ; Berichtszeitraum: 01.03.2007 - 31.10.2010 ; [Förderprogramm: FHprofUnt]
Y1  - 2011
PB  - Solar-Inst.
CY  - Jülich
ER  - 
TY  - CHAP
A1  - Alexopoulos, Spiros
T1  - Biomass technology and bio-fuels: Heating/cooling and power
T2  - Renewable energy systems : theory, innovations, and intelligent applications / eds.: Socrates Kaplanis and Eleni Kaplani
Y1  - 2013
SN  - 9781624177415
SP  - 501
EP  - 523
PB  - Nova Science Publ.
CY  - Hauppauge, NY
ER  -